Free Online Case Converter
Updated September 2026
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case. Instant conversion — free online text case tool.
Verified Capabilities
UPPER, lower, Title Case, Sentence case, camelCase, snake_case, and kebab-case, each one click away.
Paste multiple lines and convert them all at once with a single button click.
Text converts immediately inside the same text area, with a live character count shown below.
No PascalCase, CONSTANT_CASE, or alternating case options; no copy-to-clipboard button (select and copy manually); Title Case capitalizes every word, including small words like "a" and "the".
Writing, development, and content work all involve repetitive text tasks. The Case Converter automates this instantly so you can focus on what actually matters.
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case. Instant conversion — free online text case tool. Results are immediate — no waiting, no loading screens, no account required.
Who uses the Case Converter?
- Developers converting variable names between camelCase, snake_case, and kebab-case conventions.
- Content writers fixing ALL CAPS text copied from presentations or emails.
- Anyone quickly reformatting a list of lines into a consistent case.
Common uses and search terms
The Case Converter is frequently used for: text case converter, case converter, camelcase converter, snake case converter, kebab case converter. Whether you need a quick result or are working through a longer project, the tool handles all common variations without any configuration.
Why use Allio Tools's Case Converter?
Everything runs locally in your browser. No data is sent to a server, logged, or stored anywhere. The tool is completely free with no usage limits, no premium tiers, and no account required. Available in 11 languages and optimised for all screen sizes, the Case Converter works on desktop, tablet, and mobile with no app download needed.
See also:Word Unscrambler · Word Counter · Synonym Finder
How the Case Converter works
Paste or type your text into the text area.
Click the desired case button: UPPER, lower, Title Case, Sentence case, camelCase, snake_case, or kebab-case.
Your text is converted in place inside the same text area, with a character count shown below.
Click Clear to start over — there's no separate copy button, so select the text and copy it manually (Ctrl/Cmd+A, then Ctrl/Cmd+C).
Tips & tricks
- There's no copy button — the conversion happens directly inside the text area, so select all (Ctrl/Cmd+A) and copy (Ctrl/Cmd+C) to grab the result.
- Only 7 case styles are available; PascalCase, CONSTANT_CASE/SCREAMING_SNAKE_CASE, and alternating case are not included despite sometimes being expected alongside camelCase and snake_case.
- Title Case here capitalizes every word's first letter, including small words like "a" and "the" — it doesn't follow the editorial style that keeps minor words lowercase.
- Paste multi-line text and click any case button — every line converts together in one click.
Popular Case Converter Conversions
Frequently Asked Questions
Does this tool support PascalCase or CONSTANT_CASE?
No — only seven modes are available: UPPER, lower, Title Case, Sentence case, camelCase, snake_case, and kebab-case. PascalCase, SCREAMING_SNAKE_CASE, and alternating case are not options.
What is snake_case used for?
snake_case uses underscores between words, all lowercase (my_variable_name). It's standard in Python variables and functions, Ruby, SQL column names, and many file naming conventions.
What is kebab-case?
kebab-case uses hyphens between words, all lowercase (my-variable-name). It's used in HTML attributes, CSS class names, URL slugs, and file names where underscores aren't allowed.
Does Title Case here skip small words like "a" or "the"?
No — this tool capitalizes the first letter of every single word, including articles and short prepositions. It doesn't implement the editorial-style title case rule that leaves minor words lowercase.
Is there a copy-to-clipboard button?
No — the converted text replaces your original text right in the same text area. Select it manually (Ctrl/Cmd+A) and copy (Ctrl/Cmd+C) to use it elsewhere.
What formats does the Case Converter support?
The Case Converter converts between uppercase, lowercase, title case, sentence case, and more. All conversions work in both directions — instantly, with no sign-up required.
Is my data safe when using the Case Converter?
Completely safe. The Case Converter processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Is there a character or word limit for the Case Converter?
The Case Converter has no hard character limit — it processes text as large as your browser can handle, typically hundreds of thousands of characters. Very large inputs may be slower depending on your device.
Can the Case Converter process text in other languages?
Yes. The Case Converter handles all Unicode text correctly, including accented characters, CJK characters, Arabic, Cyrillic, and emoji. It works with any language that your browser renders, with no additional setup or language packs required.
Works with ChatGPT, Claude, Cursor, GitHub Copilot, VS Code, Poe and more — 106+ tools, zero data collection.